Loudspeaker and Electronic Device

The present disclosure relates to the technical field of electricity-acoustics conversion, and in particular, to a speaker and an electronic device.

In the prior art, the use of multiple resonators to increase low frequency efficiency and extend the low frequency bandwidth of a loudspeaker is well known. The challenge in applying these principles to compact and portable devices, however, is the considerable physical space required by conventional constructions of coupled cavity loudspeakers, with practical implementation challenges when the structure of coupled cavity speakers is scaled to the typical size of most portable devices.

The object of the present disclosure is to provide a loudspeaker and an electronic device, to solve the technical problem in the prior art.

In the first aspect, the present disclosure provides a loudspeaker, including a loudspeaker housing, a loudspeaker body and a resonator.

The loudspeaker housing has a receiving cavity.

The loudspeaker body is accommodated in the receiving cavity. The receiving cavity is separated by the loudspeaker body into a front cavity and a rear cavity. The loudspeaker body is provided with a sound hole. The front cavity is in communication with the outside of the loudspeaker housing via the sound hole.

The resonator is accommodated in the rear cavity. The rear cavity has at least one cavity part and at least one port part inside. The speaker body and a vibration direction of the resonator both extend along a first direction. The at least one port part extends along a second direction. A preset angle is formed between the first direction and the second direction. A first side of the resonator is correspondingly provided with one port part, and the other side of the resonator is provided with one cavity part or another port part.

As an improvement, in a loudspeaker as described above, the cavity part includes a first cavity, a second cavity and a third cavity, the port part includes a first port and a second port, and the resonator includes a first resonator, a second resonator and a third resonator.

The loudspeaker body is provided corresponding to the first cavity.

A first side of the first resonator is provided corresponding to the first cavity, and a second side of the first resonator is provided corresponding to the first port, and the first port is in communication with the second cavity.

A first side of the second resonator is provided corresponding to the second cavity, a second side of the second resonator is provided corresponding to the second port, and the second port is in communication with the third cavity.

A first side of the third resonator is provided corresponding to the third cavity, and a second side of the third resonator is exposed to the outside of the loudspeaker housing.

As an improvement, in a loudspeaker as described above, a projection of the sound hole in the first direction falls on the first resonator.

As an improvement, in a loudspeaker as described above, the cavity part includes a first cavity and a second cavity, the port part includes a first port, a second port, and a third port, and the resonator includes a first resonator and a second resonator.

The loudspeaker body is provided corresponding to the first cavity, and the first cavity is in communication with the first port.

The first side of the first resonator is provided corresponding to the first port, and the second side of the first resonator is provided corresponding to the second port, and the second port is in communication with the second cavity.

The first side of the second resonator is provided corresponding to the second cavity, and the second side of the second resonator is provided corresponding to the third port.

As an improvement, in a loudspeaker as described above, the cavity part includes a first cavity and a second cavity, the port part includes a first port, a second port, a third port, a third port, a fourth port, a fifth port and a sixth port, the resonator includes a first resonator, a second resonator, a third resonator and a fourth resonator.

The loudspeaker body is provided corresponding to the first cavity, the first cavity is in communication with the first port and the second port, respectively, the first port and the second port are symmetrically arranged at two opposite sides of the third port, the third port is in communication with the second cavity, the fourth port and the fifth port are symmetrically arranged at two opposite sides of the second cavity, and the fifth port and the fourth port are both in communication with the sixth port.

A first side of the first resonator is provided corresponding to the first port, and a second side of the first resonator is provided corresponding to the third port.

A first side of the second resonator is provided corresponding to the second port, and a second side of the second resonator is provided corresponding to the third port.

A first side of the third resonator is provided corresponding to the second cavity, and a second side of the third resonator is provided corresponding to the fourth port.

A first side of the fourth resonator is provided corresponding to the second cavity, and a second side of the fourth resonator is provided corresponding to the fifth port.

As an improvement, in a loudspeaker as described above, the first cavity, the third port, the second cavity, and the sixth port have axes coincide with each other.

As an improvement, in a loudspeaker as described above, the preset angle is 90°.

As an improvement, in a loudspeaker as described above, a length of the port part in the first direction is less than a length of the port part in the second direction.

As an improvement, in a loudspeaker as described above, an arc guide surface is provided on each of two inner surfaces on opposite sides of the port part to form a port part with a Venturi tube structure.

In the second aspect, the present disclosure provides an electronic device, including the loudspeaker as described above.

Compared with the prior art, in the present disclosure, at least one side of the resonator is provided with a port part, the port part is of a long and narrow groove structure, the resonator is provided at a lateral surface of the port part, and a space between the resonator and another corresponding lateral surface of port part is relatively small. In this case, on the one hand, the space occupied by the loudspeaker can be reduced, facilitating application to compact portable devices, and more practical design parameters for the port part and the resonator (larger port area and smaller resonator acoustical mass) can be adopted; on another hand, flow loss can be reduced, and flow noise can be reduced; and on another hand, the acoustical mass of the port part can add to that of resonator, such that any acoustic resonance induced by the interaction between the resonator and the port part is greater than the operating frequency range of the loudspeaker, so as to improve the high frequency reproduction of the loudspeaker, reduce the intermodulation distortion of the loudspeaker, and ultimately improve the acoustical mass of the loudspeaker in the electronic device.

These embodiments described below with reference to the drawings are exemplary, and are used just to explain the present disclosure, but not to limit the present disclosure.

1 5 FIGS.to 1 2 1 As shown in, an embodiment of the present disclosure provides a loudspeaker including a loudspeaker housingand a loudspeaker bodyand a resonator provided within the loudspeaker housing.

1 2 The loudspeaker housingincludes a receiving cavity configured to accommodate the loudspeaker bodyas well as at least one resonator.

2 2 2 3 4 1 18 3 1 2 The loudspeaker bodyis accommodated in the receiving cavity, the loudspeaker bodyis configured to vibrate to generate sound. The receiving cavity is separated by the loudspeaker bodyas a front cavityand a rear cavity. The loudspeaker housingis provided with a sound hole. The front cavityis in communication with the outside of the loudspeaker housingvia the sound hole18. In an embodiment, the loudspeaker bodymay include structures such as a diaphragm, a sound coil and a magnetic circuit unit. Under the action of the magnetic circuit unit, the sound rings with varying current vibrate due to Ampere forces of different values, the vibration of the vibration drives the diaphragm to vibrate, and the vibration of the diaphragm forces the surrounding air to vibrate, so as to generate sound.

4 The resonator is accommodated in the rear cavityto arrange the resonator in the propagation path of the sound wave. The resonator can be made of any material with appropriate mechanical properties. In an embodiment as described in the present disclosure, the resonator is a passive resonator.

4 2 4 4 4 4 In an embodiment of the present disclosure, there may be a plurality of resonators, of which the specific mass can be determined according to the actual situation, and is not limited herein. A rear cavityis provided with at least one cavity part and at least one port part. The loudspeaker bodyas well as the vibration direction of the resonator extend along the first direction D1, the resonator is coupled to the rear cavity, and provide acoustic impedance within the rear cavity. The acoustic impedance acts as an impedance match of the plane acoustic wave propagating along the rear cavity, so as to attenuate the high mode in the axis direction of the rear cavity. Further, the resonator is designed to concentrate such attenuation effect to high frequencies.

2 1 2 2 2 2 1 2 1 2 2 The port part extends along the second direction D. A preset angle is formed between the first direction Dand the second direction D. The value range of the preset angle can be determined according to the actual situation, and is not limited herein. In an embodiment, the preset angle is 90°. In an embodiment as described in the present disclosure, the vibration direction of the loudspeaker bodyis defined as the first direction D1, the normal direction of the vibration direction of the loudspeaker bodyis defined as the second direction D, and the first direction Dand the second direction Dare perpendicular to each other. The port part is of a long and narrow groove structure. A length of the port part in the first direction Dis much less than a length of the port part in the second direction D. The port part extends along the normal direction of the loudspeaker body.

In an embodiment of the present disclosure, the first side of the resonator is correspondingly provided with a port part, and the other side of the resonator is provided with one cavity part or another port part. The resonator is provided on a lateral surface of the port part. The space between the resonator and another corresponding lateral surface of port part is relatively small. In this case, on the one hand, the space occupied by the loudspeaker can be reduced, facilitating application to compact portable devices, and more practical design parameters for the port part and the resonator (larger port area and smaller resonator acoustical mass) can be adopted; on another hand, flow loss can be reduced, and flow noise can be reduced; and on another hand, the acoustical mass of the port part can add to that of resonator, such that any acoustic resonance induced by the interaction between the resonator and the port part is greater than the operating frequency range of the loudspeaker, so as to improve the high frequency reproduction of the loudspeaker, reduce the intermodulation distortion of the loudspeaker, and ultimately improve the acoustical mass of the loudspeaker in the electronic device.

4 FIG. 5 FIG. 19 19 19 Referring toand, as an improvement, an arc guide surfaceis provided by convex on each of the two inner surfaces on two opposite sides of the port part, so as to form the port part with a Venturi tube structure. The inside of the port part is of a hallow cavity structure similar to a Venturi shape. Each of the two opposite sides of the arc guide surfaceis connected to a straight line segment, and the arc guide surfaceconsists of a curved segment with gradually increasing diameters and a curved segment with gradually decreasing diameters, such that flow noise and distortion can be reduced while the sound waves are transmitted.

Several embodiments are listed below to further illustrate the structure of the loudspeaker of the present disclosure. One of ordinary skill in the art may know that more variation can be designed according to the following embodiments, all of which belong to the protection scope of the present disclosure.

1 FIG. 5 6 7 5 6 7 8 9 8 9 1 14 15 16 14 15 16 As shown in, in this embodiment, the cavity part includes a first cavity, a second cavity, and a third cavity. The first cavity, the second cavityand the third cavitymay have the same or different shapes and sizes, which are not limited herein. The port part includes a first portand a second port. The first portand the second portmay have the same or different shapes and sizes, which are not limited herein. Along the first direction D, the length of each cavity in the cavity part is greater than the length of each port in the port part. The resonator includes a first resonator, a second resonator, and a third resonator. The first resonator, the second resonatorand the third resonatorare passive resonator.

2 5 2 3 5 The loudspeaker bodyis provided corresponding to the first cavity, and the two opposite sides of the loudspeaker bodyare the front cavityand the first cavity, respectively.

14 5 14 8 8 2 14 8 14 2 8 14 8 14 14 8 8 14 8 14 The first side of the first resonatorcorresponds to the first cavity. The second side of the first resonatorcorresponds to the first port. The first portis of a long and narrow groove structure. The groove structure extends along the second direction D. The first resonatoris provided on one lateral wall body of the first port. The vibration direction of the first resonatoris perpendicular to the second direction D. The distance between the other lateral wall body of the first portand the first resonatoris relatively small, such that the acoustical mass of the first portadds to that of the first resonator. In this case, any acoustic resonance induced by the interaction between the first resonatorand the first portis greater than the operating frequency range of the loudspeaker, more practical design parameters for both the first portand the first resonatorare adopted, the first portmay have a larger port area, and meanwhile, the first resonatormay have a smaller acoustical mass.

14 8 2 8 14 6 6 2 1 The first resonatoroccupies only a part of the wall body of the first port. In the second direction D, the end of the first portfacing away from the first resonatoris in communication with the second cavity. The second cavityis arranged at a side of the loudspeaker body, and thus, on the first direction D, can further compress the space occupied by the loudspeaker.

15 6 15 9 9 2 15 9 15 2 9 15 9 15 15 9 9 15 9 15 The first side of the second resonatorcorresponds to the second cavity. The second side of the second resonatorcorresponds to the second port. The second portis of a long and narrow groove structure. The groove structure extends along the second direction D. The second resonatorprovided on a lateral wall body of the second port. The vibration direction of the second resonatoris perpendicular to the second direction D. The distance between the other wall of the second portand the second resonatoris relatively small, such that the acoustical mass of the second portadds to that of the second resonator. In this case, any acoustic resonance induced by the interaction between the second resonatorand the second portis greater than the operating frequency range of the loudspeaker, more practical design parameters for both the second portand the second resonatorare adopted, the second portmay have a larger port area, and meanwhile, the second resonatormay have a smaller acoustical mass.

15 9 2 9 15 7 7 6 1 The second resonatoroccupies only a part of the wall body of the second port. In the second direction D, the end of the second portfacing away from the second resonatoris in communication with the third cavity, and the third cavityis arranged at one side of the second cavity, and thus, in the first direction D, can further compress the space occupied by loudspeaker.

16 7 16 1 The first side of the third resonatorcorresponds to the third cavity, and the second side of the third resonatoris exposed to the outside of the loudspeaker housing.

8 9 14 8 15 9 8 6 9 7 4 8 9 14 15 14 15 The first portand the second portare arranged, so that there is minimal additional space between the first resonatorand the first port, and between the second resonatorand the second port. The end of the first portis in communication with the second cavity, the end of the second portis in communication with the third cavity, the volume of the cavity in which the sound waves propagate within the rear cavitychanges periodically, and the acoustic inductance of the first portand the second portadds by the mass of the first resonatorand the second resonator, thereby reducing the moving mass of the first resonatorand the second resonator.

18 1 14 18 14 14 3 In this embodiment, the projection of the sound holein first direction Dfalls on the first resonator, the cross-sectional area of the sound holeshould be less than the cross-sectional area of the first resonator, the coverage of the composite film of the first resonatoris broader, and the acoustic impedance provided by the composite film attenuates the high mode in the axis direction of the front cavitymore strongly.

2 FIG. 5 6 5 6 8 9 10 8 9 10 1 14 15 14 15 In this present embodiment, as shown in, the cavity part includes the first cavityand the second cavity. The first cavityand the second cavitymay have the same or different shapes and sizes, which are not limited herein. The port part includes a first port, a second port, and a third port. The first port, the second portand the third portmay have the same or different shapes and sizes, which are not limited herein. Along the first direction D, the length of each cavity in the cavity part is greater than the length of each port in the port part. The resonator includes the first resonatorand the second resonator. The first resonatorand the second resonatorare both passive resonators.

2 5 2 3 5 5 8 8 5 2 1 8 5 1 The loudspeaker bodycorresponds to the first cavity. The two opposite sides of the loudspeaker bodyare the front cavityand the first cavity, respectively. The first cavityis in communication with the first port. The first portis provided at the lateral end of the first cavityalong the second direction D. In the first direction D, the projections of the first portand the first cavitydo not overlap, thereby compressing the space occupied by the loudspeaker in the first direction D, and making it more suitable for compact electronic devices.

14 5 14 8 8 2 14 8 14 2 8 14 8 14 14 8 8 14 8 14 The first side of the first resonatorcorresponds to the first cavity. The second side of the first resonatorcorresponds to the first port. The first portis of a long and narrow groove structure. The groove structure extends along the second direction D. The first resonatoris provided on one lateral wall body of the first port. The vibration direction of the first resonatoris perpendicular to the second direction D. The distance between the other lateral wall body of the first portand the first resonatoris relatively small, such that the acoustical mass of the first portadds to that of the first resonator. In this case, any acoustic resonance induced by the interaction between the first resonatorand the first portis greater than the operating frequency range of the loudspeaker, more practical design parameters for both the first portand the first resonatorare adopted, the first portmay have a larger port area, and meanwhile, the first resonatormay have a smaller acoustical mass.

14 8 2 8 14 6 6 2 1 The first resonatoroccupies only a part of the wall body of the first port. In the second direction D, the end of the first portfacing away from the first resonatoris in communication with the second cavity. The second cavityis arranged at a side of the loudspeaker body, and thus, on the first direction D, can further compress the space occupied by the loudspeaker.

15 6 15 10 10 2 15 10 15 2 10 15 10 15 15 10 10 15 10 15 The first side of the second resonatorcorresponds to the second cavity. The second side of the second resonatorcorresponds to the third port. The third portis a long and narrow groove structure. The groove structure extends along the second direction D. The second resonatoris provided on a lateral wall body of the third port. The vibration direction of the second resonatoris perpendicular to the second direction D. The distance between the other side wall of the third portand the second resonator, such that the acoustical mass of the third portadds to that of the second resonator. In this case, any acoustic resonance induced by the interaction between the second resonatorand the third portis greater than the operating frequency range of loudspeaker, more practical design parameters can be adopted for both the third portand the second resonator, the third portcan possess a larger port area, and meanwhile, the second resonatorcan have a smaller acoustical mass.

8 9 10 14 8 9 15 10 8 5 9 6 10 4 8 9 10 14 15 14 15 The first port, the second port, and the third port, so that there is minimal additional space between the first resonatorand the first as well as the second port,, and between the second resonatorand the third port. The end of the first portis in communication with the first cavity, the end of the second portis in communication with the second cavity. The end of the third portis in communication with the outside. The volume of the cavity in which the sound waves propagate within the rear cavitychanges periodically. The acoustic inductances of the first port, the second portand the third portadd by the mass of the first resonatorand the second resonator, thereby reducing the moving mass of the first resonatorand the second resonator.

3 FIG. 5 6 8 9 10 11 12 13 14 15 16 17 In this embodiment, as shown in, the cavity part includes a first cavityand a second cavity. The port part includes a first port, a second port, a third port, a fourth port, a fifth portand a sixth port. The resonator including a first resonator, a second resonator, and a third resonatorand a fourth resonator.

2 5 5 8 9 2 8 9 10 5 8 9 10 10 6 1 11 12 6 12 11 13 5 10 6 13 The loudspeaker bodycorresponds to the first cavity, the first cavityis in communication with the first portand the second port, respectively. Along the second direction D, the first port, the second portand the third portare all arranged at the lateral end of the first cavity. The first portand the second portare symmetrically arranged at two opposite sides of the third port. The third portis in communication with the second cavity. Along the first direction D, the fourth portand the fifth portare symmetrically arranged at two opposite sides of the second cavity. The fifth portand the fourth portare both in communication with the sixth port. The axes of the first cavity, the third port, the second cavityand the sixth portcoincide each other, so as to increase symmetry and reduce rocking motion, and facilitate reducing the flow loss and reducing the flow noise.

14 14 10 8 10 2 14 8 10 14 2 8 10 14 8 10 14 14 8 10 8 10 14 8 10 14 The first side of the first resonatorcorresponds to the first port a. The second side of the first resonatorcorresponds to the third port. The first portand the third portare both of long and narrow groove structures. The groove structures extend along the second direction D. The first resonatoris provided on one lateral wall body shared by the first portand the third port. The vibration direction of the first resonatoris perpendicular to the second direction D. The distance between the other lateral wall body shared by the first portand the third portand the first resonatoris relatively small, such that the acoustical masses of the first portand the third portadd to that of the first resonator. In this case, any acoustic resonance induced by the interaction between the first resonatorand the first portas well as the third portis greater than the operating frequency range of the loudspeaker, more practical design parameters for both the first port, the third portand the first resonatorare adopted, the first portand the third portmay have a larger port area, and meanwhile, the first resonatormay have a smaller acoustical mass.

15 9 15 10 9 10 2 15 9 10 15 2 9 10 15 9 10 14 15 9 10 9 10 15 9 10 14 The first side of the second resonatorcorresponds to the second port. The second side of the second resonatorcorresponds to the third port, and the second portand the third portare both of long and narrow groove structures. The groove structures extend along the second direction D. The second resonatoris provided on a lateral wall body shared by the second portand the third port. The vibration direction of the second resonatoris perpendicular to the second direction D. The distance between the other side wall shared by the second portand the third portand the second resonator, such that the acoustical masses of the second portand the third portadd to that of the first resonator. In this case, any acoustic resonance induced by the interaction between the second resonatorand the second portas well as the third portis greater than the operating frequency range of loudspeaker, more practical design parameters can be adopted for both the second port, the third portand the second resonator, the second portand the third portcan possess a larger port area, and meanwhile, the first resonatorcan have a smaller acoustical mass.

16 6 16 11 11 2 16 11 16 2 11 16 11 16 16 11 11 16 11 16 The first side of the third resonatorcorresponds to the second cavity. The second side of the third resonatorcorresponds to the fourth port. The fourth portis of a long and narrow groove structure. The groove structure extends along the second direction D. The third resonatoris provided on a lateral wall body of the fourth port. The vibration direction of the third resonatoris perpendicular to the second direction D. The distance between the other side wall of the fourth portand the third resonatoris relatively small, such that the acoustical mass of the fourth portadds to that of the third resonator. In this case, any acoustic resonance induced by the interaction between the third resonatorand the fourth portis greater than the operating frequency range of the loudspeaker, more practical design parameters can be adopted for both the fourth portand the third resonator, the fourth portcan have a larger port area, and meanwhile, the third resonatorcan have a smaller acoustical mass.

17 6 17 12 12 2 17 12 17 12 17 12 17 17 12 12 17 12 17 The first side of the fourth resonatorcorresponds to the second cavity. The second side of the fourth resonatorcorresponds to the fifth port. The fifth portis of a long and narrow groove structure. The groove structure extends along the second direction D. The fourth resonatoris provided on a lateral wall body of the fifth port. The vibration direction of the fourth resonatoris perpendicular to the second direction D2. The distance between the other wall of the fifth portand the fourth resonatoris relatively small, such that the acoustical mass of the fifth portadds to that of the fourth resonator. In this case, any acoustic resonance induced by the interaction between the fourth resonatorand the fifth portis greater than the operating frequency range of the loudspeaker, more practical design parameters can be adopted for both the fifth portand the fourth resonator, the fifth portcan have a larger port area, and meanwhile, the fourth resonatorcan have a smaller acoustical mass.

14 15 1 16 17 1 In this embodiment, the first resonatorand the second resonatorare symmetrically arranged along the first direction D, and the third resonatorand the fourth resonatorare symmetrically arranged along the first direction D. A pair of resonator can be mechanically connected to each other to increase symmetry and reduce rocking motion, thereby eliminating the device vibration caused by the recoil force of the resonator.

Based on the above embodiments, the present disclosure further provides an electronic device, including, but not limited to, a mobile or fixed terminal device with a loudspeaker, such as a mobile phone, a tablet computer, a laptop computer, a wearable device, a virtual reality device, Bluetooth earphones or an on-board device.

The construction, characteristics and effects of the present disclosure are explained in detail according to the embodiments shown in the drawings. The above mentioned contents are just preferable embodiments of the present disclosure. However, the present disclosure does not define the scope of implementation as shown in the drawings. Any change made under the ideas of the present disclosure, or any modified equivalent embodiment of the equivalent change without departing from the spirit of the specification and drawings shall fall within the protection scope of the present disclosure.